I normally use ironfox, but honestly I don’t really have the technical knowledge to know which one is better. I use iceraven for some stuff because it let’s you use desktop firefox extensions. With ironfox I just use ublock and noscript, I don’t want any extra stuff that can leak data or assist in fingerprinting my browser.

I installed iceraven on a new device a few days ago and I had to turn off mozilla data collection during the set up process.